The Kona Paddy Wagon is available as a frameset. Takes mid reach brakes and has fender eyelets, so you can run 28mm tires and fenders if you want. Has a 1 1/8" fork, so you could swap for a carbon fork like the IRD/Tange if you wanted.
Here's a cheap 59cm Soma Rush. I had the 631 version for a while. This one is Prestige. 1" fork, so Ritchey and Wound Up are going to be your main options for carbon.
http://sellwoodcycle.com/consign/59c...-frameset-200/